Asta meets Nacht, a demonic host who also finds himself the vice-captain of the Black Taurus, infiltrated in Spade. During the strategic meeting of the company captains, this mysterious Knight-Mage proposes to form an elite group that will set off to deliver Yami and Vangeance in order to prevent the enemy from opening the doors of the Outworld! To join this team, Asta will have to become stronger and face the demon in him...